/Engine/Plugins/Online/OnlineServicesOSSAdapter/Source/Public/Online/SocialOSSAdapter.h
ISocial.
virtual [TOnlineAsyncOpHandle](API\Plugins\OnlineServicesInterface\Online\TOnlineAsyncOpHandle)< [FQueryFriends](API\Plugins\OnlineServicesInterface\Online\FQueryFriends) > QueryFriends ( [FQueryFriends::Params](API\Plugins\OnlineServicesInterface\Online\FQueryFriends\Params) && Params )